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https://github.com/saymrwulf/fips205-slhdsa-verified.git
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mrwulf
a0d69f029b
Full adversarial re-verification of the second-certificate window. Everything of substance HELD: - three-way fold fidelity EXACT: extracted wots_pk_from_sig_free_loop1 body == wotsChainFold step == Rust Algorithm 8, operation-for-operation (chain_free with start=msg[i], steps=W-1-msg[i], slot tmp[i], addr i as u32; adrs1 threaded forward; i' increment mirrors the range step) - axiom sweep over all 7 WotsSpec decls minimal: pure iterator lemmas = kernel-3; chain-touching = kernel-3 + oracle.f only - button green fresh; non-vacuity PROVEN (a 1-index loop derives to exactly one address-set + one chain_free at index 0) - worktree clean, heads synced, Proofs/ free of sorry/admit/axiom DRILL CATCH (self-test rot): check-selftest.sh hard-coded the single-cert CERTS/PROOFS strings, so after the second certificate landed its replacements silently no-oped and Attack 2 (smuggled axiom) started failing via the DEAD-FILE gate instead of the AXIOM gate — a self-test no longer testing what it claims. Fixed: inject the evil entries after each array's opening paren (robust to the lists growing), with asserts that abort if check.sh's array shape ever changes. Re-run: both attacks now rejected via their correct gates, selftest green. Lesson for the record: a self-test that pattern-matches the audited config rots as the config grows; anchor on structure (the array opener), never on current contents. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
60 lines
2.8 KiB
Bash
Executable file
60 lines
2.8 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Adversarial self-test of the check.sh gates (the R3-5 tradition: an audit
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# that cannot fail is theater). Two attacks, both MUST make check.sh fail:
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#
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# 1. DEAD FILE — a stray Proofs/*.lean not in the manifest.
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# 2. SMUGGLED AXIOM — a certificate whose cone contains an axiom outside
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# {kernel-3} ∪ {the five SHA-2 oracles}.
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#
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# Green here means: the gates genuinely reject both. Self-cleaning.
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set -euo pipefail
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HERE="$(cd "$(dirname "$0")" && pwd)"
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cd "$HERE"
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cleanup() { rm -f Proofs/Stray.lean Proofs/Stray.olean Proofs/EvilSpec.lean \
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Proofs/EvilSpec.olean check-evil-tmp.sh; }
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trap cleanup EXIT
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echo "check-selftest: attacking the gates"
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echo "===================================="
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# ── Attack 1: dead file ─────────────────────────────────────────────────────
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echo "-- stray" > Proofs/Stray.lean
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if ./check.sh > /tmp/selftest-dead.out 2>&1; then
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echo "✗ ATTACK 1 SUCCEEDED: check.sh stayed green with a dead file"; exit 1
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fi
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grep -q "DEAD FILE" /tmp/selftest-dead.out \
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|| { echo "✗ ATTACK 1: failed, but not via the dead-file gate"; exit 1; }
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rm -f Proofs/Stray.lean Proofs/Stray.olean
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echo "✓ attack 1 rejected (dead-file gate works)"
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# ── Attack 2: smuggled axiom ────────────────────────────────────────────────
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cat > Proofs/EvilSpec.lean <<'EOF'
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import Proofs.ChainSpec
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axiom evil_ax : True
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theorem evil_thm : True := evil_ax
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EOF
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python3 - <<'PY'
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s = open("check.sh").read()
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s = s.replace('PROOFS=(\n "ChainSpec"\n)', 'PROOFS=(\n "ChainSpec"\n "EvilSpec"\n)')
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# Robust to the growing PROOFS / CERTS lists (do NOT hard-code their current
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# contents — that rots the self-test as certificates are added): inject the
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# evil entries right after each array's opening paren.
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assert 'PROOFS=(\n' in s and 'CERTS=(\n' in s, "check.sh array shape changed"
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s = s.replace('PROOFS=(\n', 'PROOFS=(\n "EvilSpec"\n', 1)
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s = s.replace('CERTS=(\n', 'CERTS=(\n "evil_thm"\n', 1)
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assert '{ echo "import Proofs.ChainSpec"' in s, "check.sh audit import shape changed"
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s = s.replace('{ echo "import Proofs.ChainSpec"',
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'{ echo "import Proofs.EvilSpec"; echo "import Proofs.ChainSpec"', 1)
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open("check-evil-tmp.sh","w").write(s)
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PY
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chmod +x check-evil-tmp.sh
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if ./check-evil-tmp.sh > /tmp/selftest-evil.out 2>&1; then
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echo "✗ ATTACK 2 SUCCEEDED: audit passed a smuggled axiom"; exit 1
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fi
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grep -q "DISALLOWED" /tmp/selftest-evil.out \
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|| { echo "✗ ATTACK 2: failed, but not via the axiom gate"; exit 1; }
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echo "✓ attack 2 rejected (axiom gate works)"
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echo
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echo "SELFTEST GREEN: both gates genuinely reject their attacks."
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